I use Newsrob. I rarely have to enter the password, generally only if my phone has been rebooted or if it loses signal in the middle of an update. Admittedly the latest version seems a little less stable than the last one.

I bought the app FeedR of the Market for 99cents and it's well worth it, there is a Lite version to try out it's just like the full version from what i can tell but has an annoying popup. For 99 cents it seemed well worth it.

I've tried them all and I keep going back to NewsRob. I share a lot of articles and NewsRob has the best sharing features. IMO, it also is the fastest. The developer is a nice guy who always responds fast and he provides a lot of updates.

The RSS feed I subscribed to publishes articles in PDF format. I am trying to find an app for my Droid that will go download those articles for me and let me read them when I do not have an internet connection.

I tried most every RSS reader out there so far, and all they do is show me the title of the latest PDF available to download. None of the go download the PDF automatically.